Measurements of branching fractions and asymmetry parameters of $$ {\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0} $$, $$ {\Xi}_c^0\to {\Sigma}^0{\overline{K}}^{\ast 0} $$, and $$ {\Xi}_c^0\to {\Sigma}^{+}{K}^{\ast -} $$ decays at Belle

A bstract Using a data sample of 980 fb − 1 collected with the Belle detector at KEKB asymmetric-energy e + collider, we study processes $$ {\Xi}_c^0\to \Lambda {\overline{K}}^{\ast 0} Ξ c 0 → Λ K ¯ ∗ , {\Sigma}^0{\overline{K}}^{\ast Σ and {\Sigma}^{+}{K}^{\ast -} + − for first time. The relative branching ratios to normalization mode {\Xi}^{-}{\pi}^{+} π are measured be {\displaystyle \begin{array}{c}\mathcal{B}\left({\Xi}_c^0\to 0}\right)/\mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right)=0.18\pm 0.02\left(\mathrm{stat}.\right)\pm 0.01\left(\mathrm{syst}.\right),\\ {}\mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right)=0.69\pm 0.03\left(\mathrm{stat}.\right)\pm 0.03\left(\mathrm{syst}.\right),\\ -}\right)/\mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right)=0.34\pm 0.06\left(\mathrm{stat}.\right)\pm 0.02\left(\mathrm{syst}.\right),\end{array}} B / = 0.18 ± 0.02 stat . 0.01 syst , 0.69 0.03 0.34 0.06 where uncertainties statistical systematic, respectively. We obtain 0}\right)=\left(3.3\pm 0.3\left(\mathrm{stat}.\right)\pm 0.2\left(\mathrm{syst}.\right)\pm 1.0\left(\mathrm{ref}.\right)\right)\times {10}^{-3},\\ 0}\right)=\left(12.4\pm 0.5\left(\mathrm{stat}.\right)\pm 0.5\left(\mathrm{syst}.\right)\pm 3.6\left(\mathrm{ref}.\right)\right)\times 0}\right)=\left(6.1\pm 1.0\left(\mathrm{stat}.\right)\pm 0.4\left(\mathrm{syst}.\right)\pm 1.8\left(\mathrm{ref}.\right)\right)\times {10}^{-3},\end{array}} 3.3 0.3 0.2 1.0 ref × 10 3 12.4 0.5 3.6 6.1 0.4 1.8 statistical, from \mathcal{B}\left({\Xi}_c^0\to {\Xi}^{-}{\pi}^{+}\right) asymmetry parameters \alpha \left({\Xi}_c^0\to 0}\right) α -}\right) 0 . 15 ± 22(stat ) 04(syst 52 30(stat 02(syst ), respectively, followed by systematic.